Some of these have been argued for centuries...
1.Maximus vs. William Wallace
2.push vs. pull
3.Hydrochloric acid vs. water
4.metric vs. not metric
5.versus vs. verses
6.diatribe vs. Monologue
7.Will vs. Grace
8.Britney vs. the music
9.Ginger vs. Mary Ann
10.velcro vs. laces
11.chairs vs. benches
12.David Arquette vs. talent
13.Hansel vs. Gretal
14.Little Red Riding Hood vs. the Big Bad Wolf
15.blankets vs. covers
16.Lemuiex vs. Gretsky
17.smokers vs. pyromaniacs
18.driving vs. flying
19.the weeping willow vs. the mighty oak
20.jingle bells vs. silent night
21.60 vs. 75 watt light bulbs
22.crunchy vs. smooth peanut butter
23.Justin Timberlake vs. wardrobes
24.right vs. left
25.fiction vs. nonfiction
26.Clark Kent vs. Superman
27.annoying vs. hilarious
28.present company vs. sanity
29.Nyquil vs. Dayquil
30.Godzilla vs. King Kong
31.Oranges vs. Apples
32. Dramatic pause vs. stammering
33. Nirvana vs. Pearl Jam
34. Grammer vs. message boards
35. Frasier Crane from Frasier vs. Frasier Crane from Cheers
36. Blankets vs. Covers
37. Console X vs. Console Y
38. Grimus vs. the bubonic plaugue
39. rock vs. a hard place
40. Rocky vs. Mr. Miagi
41. Strippers vs. dried paint
42. unmovable object vs. moving companies
43. Indiana Jones vs. Han Solo
44. Zach vs. Slater
45. Maytag repairman vs. Mr. Whimple
46. Mr. Magoo vs. Tarzan
47. Reality tv stars vs. self respect
48. Pot heads vs. vikings
49. Magellon vs. Don Pardo
50. Lucky Charm's marshmallows vs. Crunch berries
51. Captain Planet vs. Earth, Wind, Fire, Water, and Heart*
52. Closed door vs. wall
53. Transformers vs. Go-bots
54. Rapunzel vs. Aretha Franklin
55. Hood vs. Ghetto
56. Iron Man vs. The Iron Giant
57. Egg Rolls vs. Taquitos
58. New York vs. York
59. Boulevard vs. Avenue
60. Crack vs. Heroin
61. Assortment vs. Collection